body {
	font-family: microsoft yahei;
	color: #555;
	background: #F2F7FA;
	margin: 0;
	padding: 0;
}

.wrap {
	max-width: 920px;
	margin: 0 auto;
	background: #fff;
	padding: 20px;
}

.wrap>h1 {
	font-size: 22px;
	text-align: center;
	margin: 0;
}

button {
	width: 16px;
	height: 16px;
	border: none;
	background: url(../img/checkbox.png) no-repeat;
	vertical-align: middle;
	position: relative;
	left: -10px;
}

button:hover {
	cursor: pointer;
}

.btn_checked {
	background-position: 0 -16px;
}

input[type="checkbox"] {
	display: none;
}

li>h3 {
	font-size: 16px;
}

li>p {
	margin: 0 0 0 30px;
	line-height: 30px;
}